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HV-DPCV-26-12N
CISSOKO
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Double Pilot Operated Check Valve, 3/4″ NPT, 26 GPM. Double Pilot check valves are used to block the cylinder in both directions. Flow is free in one direction and blocked in the reverse direction until pilot pressure is applied.
Features and Benefits
Dual Cylinder Locking: Features a double pilot configuration that locks a hydraulic cylinder or motor in position from both directions, preventing any drifting or movement caused by internal valve leakage.
Pressure-Responsive Operation: Utilizes a precise internal pilot piston that reacts to upstream fluid pressure, instantly opening the reverse check path to allow smooth, controlled retraction or movement.
High-Volume Flow Capacity: Engineered to seamlessly handle massive fluid flow volumes up to 26 GPM (Gallons Per Minute) without causing restrictive pressure drops or fluid overheating in heavy-duty commercial circuits.
Rugged Component Construction: Built with a high-strength block housing and hardened internal components to provide maximum structural durability under extreme operational stresses.
Massive Threaded Ports: Equipped with precision-machined 3/4" tapered pipe thread connections that accommodate large plumbing lines, ensuring a tight mechanical fitment and excellent leak resistance under heavy system loads.
Flow | 26 GPM | Max Pressure | 4300 PSI |
Working Ports | 3/4" NPT | Brand | Hydro-Pack |
Weight | 4.2 LBs | GTIN | 850054386595 |
Applications
Ideal for: Heavy-Duty Construction Equipment, Large Industrial Hydraulic Systems, High-Capacity Stabilizer Jacks, Heavy Agricultural Machinery, Large Excavator Outriggers, and Commercial Power Units requiring reliable, dual-direction cylinder position locking under high-volume flow conditions.
Valves are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the valve from environmental damage and moisture.
Custom Crates / Heavy-Duty Cartons: For larger, heavier valves or multi-item units, ensuring safe handling.
Documentation: Includes installation guides, maintenance instructions, and warranty details. Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.
1. What is the primary purpose of a double pilot operated check valve in a hydraulic system?
A double pilot operated check valve is designed to lock a hydraulic cylinder or motor securely in place from both directions when the directional control valve is shifted to its neutral center position. It completely eliminates cylinder drifting or creep caused by external loads or gravity, which typically happens when a standard directional control valve leaks oil or slips internally over time.
2. How does the pilot piston allow the high-flow cylinder to move when needed?
When pump pressure is applied to move the cylinder in one direction, fluid enters the valve manifold and forces a built-in internal pilot piston across the valve body. This piston mechanically pushes open the opposite check valve poppet, which allows the return oil from the rod or base end to escape freely back to the reservoir so the cylinder can retract or extend smoothly without hydraulic lockup.
3. What do the "3/4 inch" and "26 GPM" ratings mean for my high-flow setup?
The "3/4 inch" size refers to the standardized nominal tapered pipe thread ports, which provide a wide, unobstructed oil passage for high-volume networks. The "26 GPM" (Gallons Per Minute) rating represents the maximum volume of hydraulic fluid that can pass through the valve block every minute without causing restrictive backpressure spikes, severe horsepower loss, or fluid overheating in heavy industrial or commercial circuits.
4. Why does my heavy cylinder chatter or shake when retracting through this valve?
Cylinder chatter or severe mechanical vibration usually happens when there is an mismatch in the pilot ratio or a lack of down-stream flow restriction in the circuit. If the heavy load drops faster than the pump can supply oil, system pressure immediately drops, causing the internal pilot piston to repeatedly close and open very rapidly; installing a flow control restriction on the cylinder return line will fix this cycle.
5. What causes a high-flow double pilot operated check valve to lose its locking capability?
The most common cause of position drifting or lock failure is fine particulate contamination within the hydraulic fluid, such as dirt, grit, or metal filings. If abrasive debris gets trapped between one of the hardened steel poppets and its matching seat, the valve cannot form a 100% mechanical seal, allowing pressurized oil to bypass and causing the cylinder to drift under load.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
Valves are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the component does not contain hazardous materials.
Factory Testing: Every valve is rigorously tested for performance, pressure, and leak integrity before shipping.
1.What's our advantages?
Factory established in 2005;
With a great deal of production experience;
80+ employees become the professional team;
Constant updated ERP system ensure efficiency of work;
Sophisticated equipment ehanced the accuracy of products;
Professional salesmen provide the greast service;
With a large number of famous customers all over the world;
Great after-sales service;
With the long term cooperation with famous logistics and express company in China,provide the better goods service.
Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.
Of course we can. Just send me your logo we can make it for you.
America(40.5%):USA, Canada, Argentina, Brazil
Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.
Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.
Others(5.8%).
The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.
The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.
Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.
Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.
